| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Aboud Matt | SVP, Strategy & Business Dev't | C/O CENTURY ALUMINUM COMPANY, 1 S. WACKER DRIVE, SUITE 1000, CHICAGO | /s/ Paul Sharobeem, attorney-in-fact for Matt Aboud | 04 Mar 2026 | 0001863408 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CENX | Common Stock | Sale | $636,615 | -12,126 | -15% | $52.50 | 67,814 | 02 Mar 2026 | Direct | F1 |
| transaction | CENX | Common Stock | Sale | $156,483 | -2,971 | -4.4% | $52.67 | 64,843 | 03 Mar 2026 | Direct | F2, F3 |
| Id | Content |
|---|---|
| F1 | The price reported above reflects the weighted average sale price for the shares which were sold in multiple transactions at prices ranging from $51.28 to $53.21, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the specific number of shares and prices at which the transactions were effected. |
| F2 | The price reported above reflects the weighted average sale price for the shares which were sold in multiple transactions at prices ranging from $52.50 to $52.75, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the specific number of shares and prices at which the transactions were effected. |
| F3 | Includes unvested RSUs granted to the Reporting Person under the Issuer's Long-Term Incentive Plans. |